Hi I have always used ngk PFR6B, however halfords do bosch super 4 for the impreza, I wandered if these were better or worse??

 

Don't think they will last as long as ngk are made to last longer due to where they are located on the scoobs

 

+1

 

But is the gapping the same?? I ask because it is being re tuned tomorrow hoping to make 480ish, and I have a pair for free brand new being offered. Still boxed etc.. Will they be the same as the ngk apart from lasting life?

 

I ask about the gap because Bosch standard plugs for the impreza turbo listed, come with 1.3mm gap!!! And ideally I need 0.6 - 0.65!!